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Cooling passages for inner casing of a turbine exhaust

一种内部壳体、涡轮机的技术，应用在机械设备、发动机元件、机器/发动机等方向，能够解决无法充分且均匀地冷却、支柱热收缩和热膨胀差异、热应力损坏等问题

Active Publication Date: 2016-01-06
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inner casings in turbine exhaust components may not be adequate and uniform due to differences in body mass throughout the inner casing, such as at the parting line and on the flanges at the root of the struts connected to the inner casing ground cooling
Uneven cooling of the struts can cause differences in thermal contraction and thermal expansion of different regions of the inner shell and cause damage associated with thermal stress

Method used

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  • Cooling passages for inner casing of a turbine exhaust
  • Cooling passages for inner casing of a turbine exhaust
  • Cooling passages for inner casing of a turbine exhaust

Examples

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Embodiment Construction

[0018] figure 1 A conventional inner housing 100 is shown with cooling passages along the inner housing. The inner housing 100 includes semi-cylindrical housing covers, namely an upper inner housing cover 120 and a lower inner housing cover 130 . The housing shells are joined at the parting line 106 (eg, the seam between the cylinder shells) by joining the two upper flanges 122 with the two lower flanges 132 at the parting line 106 .

[0019] The struts 102 are located on the outer circumference 108 of the upper inner housing shell 120 and the lower inner housing shell 130 of the inner housing 100 . The struts 102 on the upper inner housing shell 120 and the lower inner housing shell 130 are symmetrical, and the struts 102 are generally equally spaced from each other.

[0020] As used in conventional gas turbine exhaust sections, the inner casing is positioned such that the heated exhaust flow from the gas turbine exits the exhaust section by flowing through struts on the in...

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Abstract

An inner casing assembly for a turbine including: an annular inner casing including cooling passages, wherein each passage extends through a wall of the inner casing from a source of cooling fluid to an outer surface of the wall of the inner casing, and struts extending outward from the outer surface of the inner casing wherein the cooling passages are arranged on the inner casing such that a pair of the cooling passages is on opposite sides of each of the struts, and the cooling passages in each pair are equidistant to the corresponding strut.

Description

technical field [0001] The present invention relates generally to cooling of the exhaust section of a gas turbine, and more particularly to cooling of struts on the gas turbine inner casing in the exhaust section. Background technique [0002] A gas turbine engine combusts a mixture of fuel and compressed air to produce hot combustion gases that drive turbine blades to rotate a shaft supported by bearings and cylinders in the exhaust section. The rotation of the shaft can generate a lot of heat in the turbine. Additionally, hot turbine exhaust flowing through the exhaust section may transfer heat to exhaust cylinders in the exhaust section. [0003] The inner casing in the exhaust section of a gas turbine is heated by the exhaust gas from the turbine engine. The inner housing is also subject to thermal heating due to friction from the shaft in the cylinder. Inner casings in turbine exhaust components may not be adequate and uniform due to differences in body mass througho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/14F01D25/12
CPCF01D9/065
Inventor S.桑迪拉穆尔蒂S.帕卡拉
Owner GENERAL ELECTRIC TECH GMBH
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